Thick, bulging, protruding, and crowding your case, those are the other guy's fans. But Prolimatech looks to give you your space back! No thicker than a stack of 11 pennies, the Ultra Sleek Vortex Fan is only 15 mm thick! With 17 blades and variable fan speeds of 300 to 1000 RPM, this sleek machine offers superb high static pressure and wind volume while hardly making a noise!